Hey I wanna challenge myself and make something that allows be to monitor my laps in the pool via a computer. I was think of something like a waterproof pressure mat hanging in the water, connected to a USB or Serial port connected to the computer.
Any help would be great
Thanks
Thanks Where can I find this project
A Recent Silicaon Chip had just such a project Dave
You want to use a mains powered appliance in the vacinity of a swimming pool? ensure that the computer is correctly earthed and/or use an isolating transformer or RCD ....
maybe replace one of the buttons of an old mouse with wires leading to the pressure pad.
from the safety standpoint and to keep the PC away from corrosive chemicals it may be better tu use an air-filled pressure pad connected by a long hose to a remotely located pressure switch connected to a old mouse (or directly to pins used for the fire button on the joystick port etc...).
suitable pressure switches can be salvaged from many models of washing machines (used in the water level detector)
as for the pressure pad, maybe a wheelbarrow inner-tube between two sheets of stiff plastic (acrylic/lexan/fibreglass) etc
(the pressure switch could probably be made this way too)
Bye. Jasen
Thanks very much
So can you pop it a couple of times while the coach is looking elsewhere? or will repeat hits within say 30 sec. be locked out
not by the hardware, That's a software issue... if there's a pad at each end that'd stop that sort of cheating.
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